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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001154
EISBN: 978-1-62708-223-5
... Abstract The cause of fracture of two piston rods of hammers of a drop forge was determined. The first rod of 180 mm diam consisted of an unalloyed steel with 0.37% C and 0.67% Mn and had a strength of 56 kp/sq mm at 26% elongation. Fatigue fractures propagated from several points which could...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001271
EISBN: 978-1-62708-215-0
... Abstract A carbon steel ball-peen hammer ejected a chip that struck the user's eye. Failure occurred when two hammers were struck together during an attempt to free a universal joint from an automotive drive shaft. Two samples were cut from the face of the hammer one through the chipped area...
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Published: 01 January 2002
Fig. 13(a) AISI S5 tool steel hammer head that cracked during heat treatment. The fracture was caused by quench cracking that was promoted by the decarburized surface ( Fig. 13(b) ) and deep stamp mark (arrows). Actual size More
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Published: 01 January 2002
Fig. 13(b) Macroetched disk cut from the head of the sledge hammer shown in Fig. 13(a) . The heavily decarburized surface is revealed by macroetching. Actual size More
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Published: 01 January 2002
Fig. 37 Failure caused by a forging lap in a sledge-hammer head. (a) Cracks on the striking face soon after the hammer was first used. (b) A hot alkaline chromate etch revealed oxygen enrichment (white region) adjacent to the crack. 65× More
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Published: 01 January 2002
Fig. 10 Fracture surface of a piece of glass broken by striking it with a hammer. Origin is at the lower left; the wavelike lines are Wallner lines. Optical microscope; reflected light; picture width ∼3 mm. Source: Ref 3 More
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Published: 01 January 2002
Fig. 21 Pivotal hammer impact tester. Source: Ref 41 More
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Published: 01 January 2002
Fig. 1 Hammer-testing device used by McIntire and Manning. Source: Ref 3 More
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Published: 01 January 2002
Fig. 7 Front (a) and side (b) views of the hammer impact tester More
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Published: 01 January 2002
Fig. 27 Spall cavity in a small ball-peen hammer, 49 HRC. (a) 10×. (b) 28×. (c) 28×. (d) 224× More
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Published: 01 December 1992
Fig. 2 View of the other striking surface of the hammer after magnetic particle testing. Note magnetic particle indications. More
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Published: 01 December 1993
Fig. 1 The face and bell of the ball-peen hammer, showing the area where the chip was ejected. The chip in shown in the insert at the right. The fracture was conchoidal and brittle in appearance. More
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Published: 15 January 2021
Fig. 23 Reciprocating hammer impact tester. Reprinted from Ref 36 with permission from Elsevier More
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Published: 30 August 2021
Fig. 13 (a) AISI S5 tool steel hammer head that cracked during heat treatment. The fracture was caused by quench cracking that was promoted by the decarburized surface and deep stamp mark (arrows). Actual size. (b) Macroetched disk cut from the head of the sledgehammer. The heavily More
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Published: 01 June 2019
Fig. 8 a). Broken piston rod of a steam hammer. Fracture surface. 1 2 × b. Edge zone near the origin of the vibrational fracture, etched in nital. 80× More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001122
EISBN: 978-1-62708-214-3
... Abstract A sledge hammer chipped during use. The chip struck a by stander in the eye, leading to its loss. The hammerhead surface was examined visually, nondestructively (magnetic particle method), and stereo microscopically, and a microstructural analysis of a cross section of the head...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001378
EISBN: 978-1-62708-215-0
... revealed evidence of severe hammer blows to the clevis and boss areas and a gap between the die and the underside of the boss. Magnetic particle inspection showed cracks at the thread roots that, when examined metallographically, were found to contain MnS stringers. The cracking of the threads...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001055
EISBN: 978-1-62708-214-3
..., a possible stress raiser at the intersection of the spiral weld and girth weld, and sudden impact loading, probably due to water hammer. Use of a semi- or fully killed steel with a minimum Charpy V-notch impact value of 20 J (15 ft·lbf) at 0 deg C (32 deg F) was recommended for future water lines. Certified...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003566
EISBN: 978-1-62708-180-1
... of new, more spall-resistant metals is described, and the safety aspects of striking/struck tools in railway applications are reviewed. Development of Testing and Analysis Methods for Spalling of Striking Tools As a result of eye accidents that occurred during the use of hammers in the 1950s, A.H...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003565
EISBN: 978-1-62708-180-1
... Abstract This article discusses the generic features of impact wear on metals, ceramics, and polymers. It describes normal impact wear and compound impact wear, as well as the features of impact wear testing apparatus such as ballistic impact wear apparatus and pivotal hammer impact wear...